Unite States Attorneys (also known as federal prosecutors) represent the United States federal government in United States district court and United States court of appeals. There are 93 U.S. Attorneys stationed throughout the United States, Puerto Rico, the US Virgin Islands, Guam, and the Northern Mariana Islands. One U.S. Attorney is assigned to each of the judicial districts, with the exception of Guam and the Northern Mariana Islands where a single U.S. Attorney serves both districts. Each U.S. Attorney is the chief federal law enforcement officer within his or her particular jurisdiction, acting under the guidance of the United States Attorneys' Manual. They supervise district offices of as many as 350 assistant U.S. attorneys, with as many as 350 more support personnel. U.S. Attorneys and their offices are part of the Department of Justice. U.S. Attorneys receive oversight, supervision and administrative support services through the Justice Department's Executive Office for United States Attorneys. Selected U.S. Attorneys participate in the Attorney General's Advisory Committee of United States Attorneys.